Amphioxus - ndiko kuti mhuka? Amphioxus: tsananguro, mamiriro, unhu uye zvinhu

Amphioxus - mhuka chokuita norudzi Chordates (boka bescherepnyh). Tinopa iwe kuzivana naye. We funga chivako, unhu uye zvimwe Amphioxus. Miti iyi inowanikwa mumakungwa ari dzinodziya uye dzinopisa zvikamu. Zvikurukuru, Amphioxus kurarama uye muGungwa Dema.

muviri chimiro

Amphioxus muviri chimiro denderedzwa, tapering kuti muswe. Kureba kubvira 4 kusvika 8 cm. The muviri akafuka chete paiva epithelium uye cuticle secreted nemasero epithelial. Pasi epithelium ndiyo nhete paiva connective zvinyama - corium. The dorsal divi hunde uye muswe zenze unocheka aneganda muchirugu. Muviri flattened laterally; achitevedza ventral divi aiwanzopiwa wokushanda tatamuka metaplevralnye matanga unobatanidza kuti undernail chikamu zenze muchirugu. mamiriro ichi hwezvekukurukurirana ari Kudzikamiswa muviri chinzvimbo mumvura uye anowedzera nzvimbo kuonana nayo, izvo zvinokosha kana uchifamba nomuviri dzinokanganisa.

zvetsandanyama nemapfupa maitiro

Hwaro nezvezvinotaurwa puranga riri Chord, yaiva pedyo muviri kubva musoro kumugumo caudal nharaunda. The Chord, iro rine lancelet - inotungamirwa ichi akanyudzwa connective homwe, izvo kurongedza chimiro kutsigira zvinhu zenze ukagunzva ane chimiro chondroid pembiru. Rinotaurawo chinopinda pakati munhu zvikamu musculature (Myomere) dzichiumbwa miosepty kupatsanura pavo. Myomere akatsaura mioseptami, yakabatana Chord kumativi ose.

muscularity

Striated tsandanyama. Separate Myomere vane conical chimiro, sokunge retracted kupinda mumwe, pamwe asymmetrical urongwa avo pakatarisana pakati neimwe kurudyi riri miosepta kuruboshwe ndiEzekieri. Progressive rutapudzo kuti tsandanyama chidimbu ndiyo kurutivi muviri makakombama, mafungu kutamira kubva kumusoro kusvika muswe. Natural hunhu tsandanyama marwadzo ari nokudzorwa nechepakati tsinga.

Amphioxus Chord nechemberi kuguma kunosvika kupfuura Neural chubhu, saka zita boka kuroorwa subtype - Golovohordovye. It rinoumbwa vakawanda transverse tsandanyama ose ndiro takapoteredzwa connective tishu mumuhara. The nomumwe Mahwendefa vanoparadzaniswa in, asi neVadzidzi pedyo Via pfupi outgrowths.

kweropa maitiro

Zvinofungidzirwa kuti kweropa hurongwa mhuka akavharwa. Zvechokwadi, hapana makwanza ropa, asi hapana capillaries chaivo (thinnest akavakirirwa midziyo pamwe monolayer) vashoma arteries ropa anopinda intercellular nzvimbo (anoenderana vakuru capillaries), uye nokudaro akaunganidzawo mune mutsinga diki.

dzokubereka nadzo

Flooring Amphioxus maitiro inomiririrwa dzakatevedzana aiwanzopiwa wokushanda gonads (gonadal). Vari rakamiswa pa masvingo atrial mhango. Bescherepnyh (lancelet kusanganisira) dioecious. The gonads vechirume zvechipameso yakafanana, zvakasiyana chete nokukura gametes (oocyte hombe). Vakakura dzokubereka masero kuburikidza pakakoromoka gonads rusvingo vanowira atrial mhango, apo mvura iyerere asunungurwa kuburikidza atriopor kunze. Development kunoitika muna aqueous vezvenhau uye kunoratidzwa muna kuti pane larval Danho.

The nemamiriro mazana

The nemamiriro mazana ane nzira yaingowanikwa kwazvo: mukutanga mumatanho riri ichazivikanwa noku asymmetrical urongwa pamuromo (kuruboshwe), uye dakashwa slits (kurudyi), nhamba iri duku pakutanga. Papera chete wamatanda dakashwa slits kunoita kuti dumbu, uye ipapo kurutivi rworuboshwe, uye muromo wacho misha pasi. Kuwanda dakashwa mawindo yakawedzera breakout okuwedzera cheap car insurance nokuita longitudinal partitions mu munazvo. Dukutu nokushingaira kunoita tichibatsirwa cilia kufukidza muviri, uye gare gare lateral vaikunga womuviri, sezvinoita nezvimiro vakura. Iye muitiro vanoshingaira dzaifura mhuka duku planktonic. Perioral fanera pamwe tentacles aumbwa chete pakupera larval kukura, asi dukutu, sezvinoita muviri vakura, yezwi upenyu pasi.

atrial mhango

Amphioxus - mhuka ane atrial mhango. In mugomba rake achizarura uye dakashwa slits metanefriliev. Pano wouya akaibva mazai uye urume. Zvose izvi anotaura kubatana atrial mhango pamwe kwokunze kwezvakatipoteredza. Anatomically, ukama ichi inomiririrwa buri, rinonzi atrioporom uye kuvhurika outwards pamusoro ventral kurutivi rwemberi chikamu muviri pamberi horo. The pachena Link atriralnoy mhango pamwe kwezvakatipoteredza richiratidzwa hunhu waro inotungamirwa.

Dukutu Amphioxus muviri parutivi masvingo dakashwa mawindo vari inoumbwa longitudinal pazvirugu metaplevralnye. Zvishoma nezvishoma wedzera muna lateral negwara uye pasi, uye ipapo fused pamwechete. The nzvimbo pakati pazvirugu uye rinomiririra atrial mhango. Nemamwe mashoko, atrial mhango, iro rine lancelet - ndiyo chikamu kwokunze kwezvakatipoteredza akabatwa metaplevralnymi matanga. It anofukidza huro mugove ura, hombe chikamu penyika gonads, achitora akakura nzvimbo uye substantially displacing rose, iro rakachengetwa chete muchimiro vachipiwa in pamwe yokumusoro pamucheto pharynx, uyewo mune endostyle metaplevralnyh matanga.

The zvipenyu kukosha atrial mhango nokuda hunhu mufananidzo Amphioxus mupenyu. Kana vachiviga muvhu mvura nzira yokubudisa pamusoro dakashwa slits zvakaoma, ivhu nezvimedu vanogona kupinda dakashwa makomba uye kuzadza navo. Paumbwe atrial mhango, ane masvingo dakashwa mawindo akaparadzana kuonana pasi, kunobvisa chipingamupinyi ichi. Mvura, nesimba ichibva atriopora, zvinoputsa ivhu munzvimbo iyi, kuona vakasununguka kufema uye excretion pamusoro metabolic zvigadzirwa. Sezvambotaurwa, muna Amphioxus mazana, achitungamirira pelagic, atrial mhango ikoko. Kwete izvozvo, uye vanoverengeka mhando mhuri Amphioxididae yokutungamirira pelagic uye munhu mukuru.

Ndivo chikuru zvinhu Amphioxus - mumwe vamiririri chordates.